Up! is the fourth studio album by Canadian singer Shania Twain. It was released on November 18, 2002, by Mercury Nashville. Three versions of the album were released: a pop version (red disc), a country version (green disc), and an international version (blue disc) in the style of Indian film music; all three discs contain exactly the same track listing and feature distinctly identifiable picture labels (for example, Twain sports a cowboy hat on the green country disc.) In the U.S., Up! debuted at #1 with sales of 874,000 copies. On September 23, 2004, the RIAA certified Up! at 11× Platinum,[1] giving her the distinction of being the only female artist to have three consecutive Diamond albums released in the United States.

On October 2, 2002, Twain performed on the Dutch program TROS TV Show. On October 5 she appeared on Wetten, dass..?. On October 19 she appeared on the BBC show Parkinson and on France's Star Academy. On October 26 she filmed a mini-concert for CD:UK. On November 6, she launched the U.S. leg of the promotional tour by opening the 2002 Country Music Awards. On November 24, Twain performed in Edmonton at the 2002 Grey Cup halftime show.

The album debuted at #1 on both the Top Country Albums chart and the Billboard 200, after selling 874,000 copies in its first full week of release.[3] On its second week, it remained at the top spot on both charts, selling 623,000 copies. During its third week, sales were still strong to top both charts again, selling more than 317,000 copies, beating Tim McGraw's Tim McGraw and the Dancehall Doctors which held the number two spot in a second consecutive week after selling over 250,000 copies, and Mariah Carey's Charmbracelet.[4] Its fourth week sales were enough to keep her on #1 on its fourth week, this time selling more than 373,000 copies. Its last reign on the All Genre chart was during its fifth week, as it sold more than 459,000 units. The albums five-week total alone stands at an estimated 2,646,000 units. The RIAA certified the album at 11× platinum, denoting shipments of 5.8 million in the United States; the RIAA counts each disc separately for certification purposes. As of 2007, Up! has sold 20 million copies worldwide.[5][6] It stayed in the Top 200 of the Billboard top 200 albums sales chart for more than 60 weeks.

The album was also certified diamond in Canada 17 days after its release date.[7]

In 2007, the album's cover was listed on Maxim's Sexiest Album Covers.[8]

Upon its release, the album received positive reviews from most music critics, based on an aggregate score of 72/100 from Metacritic.[9]Stephen Thomas Erlewine editor from Allmusic rated it four-and-a-half-stars out of five, praising Twain for: "been writing well crafted songs as universal anthems, so listeners can hear themselves within these tales."[11] Erlewine further commented that: "The album had big, polished, multipurpose hooks and big, sweeping emotions. This is Super-Size pop, as outsized and grandiose as good pop should be", he concluded.[11] Matthew Bjorke from About.com rated it four-stars out of five and said that: "This 19 track opus is sure to please most fans of both pop and modern country."[10] The Blender review was also positive, saying that: "Twain's songs are never deep, but they have hooks tattooed on their skin and harmonies that glow like bar lights."[13] Also with a positive review, Billboard said that: "[It's] quintessential Shania, light as vapor, sweet as sugar, rendered with personality and undeniable charisma. Expect precious metal."[14] Andrew Lynch from Entertainment.ie rated it three-stars out of five and said that: "The songs, themselves, meanwhile, are as bland and one-dimensional as they were on the smash hit Come On Over, sassily upbeat stuff with a dash of girl power thrown in for good measure. A high proportion of them, however, are also infuriatingly catchy - suggesting that Twain may well have another global success on her hands."[15]

Chris Willman from Entertainment Weekly was largely positive with the album, gaving an "A" grade for the album, comparing the album to "ABBA's Gold without all the melancholy." He also complemented "the sheer exuberance and joy of craftsmanship in this double-Up!-manship don't feel like mercenary insincerity. They resemble something like actual generosity... not to put too fine a point on it."[16] The PopMatters review was average, giving it six stars out of ten and saying that the album "got everything from dance numbers to ballads, and it's vintage Shania". The review further said that: "Up! is a sense of Twain trying -- desperately trying at all levels -- to touch everyone, to express universal truths by artificial means: beats, tempos, instruments, etc."[17] The review concluded that: "Up! is too generic and emotionless for that level of diversity, but in a very real sense, Twain has taken country music to its next level of popularity where country and pop are virtually indistinguishable."[17]Robert Christgau on his Consumer Guide Review praised the tracks "I'm Gonna Getcha Good! " and "Ka-Ching!".[18] The Rolling Stone review was positive, rating it four-stars out of five and saying that: "Up! would be a knockout even if it were limited to its one disc of country music.... But the second, relentlessly kinetic pop disc is a revelation."[19] Jennifer Nine from Yahoo! Music rated it six-stars out of ten, saying that: "'Up!' is not without its little oddities and delights." And concluded that: "'Up!' takes on its all-things-to-all-wallets mission with real appetite."[20] Alanna Nash from Amazon was largely positive and concluded that: "There's something oddly hypnotic about much of this project, and it may be simply hearing what Shania can do when she abandons the pretense of being a country singer and concentrates on music. Call this a guilty pleasure--pop, country, or somewhere in between."[12]